전자제어 디젤엔진의 성능최적화를 위해 적용한 요인배치법의 유효성 검토

Abstract

In previous experiments, the engine optimization was carried out through the partial factoring method and the response surface method. however, since the experiment was conducted in a state where the level of the factors was not appropriate, the central point was not found in the reaction surface analysis method. as a result, proper optimization of the diesel engine performance test was not obtained. In this study, the effectiveness of the partial factorial method and the full factorial method were examined in the performance test of the electronically controlled diesel engine. PI, PCR, IT, EGR, and VGT were used to control the electronically controlled diesel engine. NOx, CO, and SFC were used as response values ​​for the five parameters. as a result of the comparative analysis of the main effect by applying the partial factorial method and the complete factorial method, it was possible to quantitatively evaluate the data of nitrogen oxide and carbon monoxide applied partial factorial method and complete factorial method. However, the fuel consumption rate could not be quantitatively evaluated. Therefore, we conducted experiments on external factors that affect fuel consumption measurement. The external factors were selected by the influence of the wind generated by the cooling fan and the vibration caused by the engine. experimental results show that the difference of fuel consumption is 0.79g when the windshield and vibration pad are not attached and when they are attached. However, it was confirmed that the error is significantly smaller than the error in the main effect. It is considered that there are few external factors influencing the electronic balance in fuel consumption measurement. The results of the factoring method application in the diesel engine performance test were validated for the partial factoring method but it is not valid for the partial factoring method in the fuel consumption ratio (SFC) measurement.